FMCSR 393.95B: Warning Devices Missing — Driver Q&A

No — almost certainly not. Across 12,435 all-time citations for 393.95B in our inspection records, only 2 vehicles were ever placed out of service, producing a 0.0% OOS rate. That's a dramatic contrast to the all-FMCSR average of 31.4%. The code is not OOS-eligible, meaning inspectors are not authorized to park your truck for this violation alone. You'll get the citation and the CSA points, but your wheels keep rolling — assuming no other defects are found during the same inspection.

393.95B carries a severity weight of 4 CSA points. That base score then gets multiplied based on how recently the inspection occurred: violations in the last 6 months receive the highest multiplier, while older violations carry less weight as they age out. The points land in the Vehicle Maintenance BASIC, which FMCSA uses to assess carrier safety fitness. Because the OOS rate is 0.0%, there is no additional OOS-severity bump — you're working with the flat 4-point weight and whatever time-based multiplier applies.

Act on equipment and paperwork the same day. Here's what the co-occurring violation pattern from our database tells you to address first:

1. Restock your emergency kit. 393.95B means your reflective triangles or spare fuses were missing — replace them before your next pre-trip.
2. Check your fire extinguisher. 393.95A (fire extinguisher missing/defective) appeared in 193 of the same inspections in the last 90 days.
3. Inspect all lamps. 393.9 (Inoperable Required Lamp) co-occurred in 298 shared inspections.
4. Document everything. 396.17C (no proof of periodic inspection) showed up in 125 shared inspections — have your inspection paperwork accessible.
5. Verify your windshield. 393.78 co-occurred in 203 shared inspections.

It's relatively minor on the severity scale. Our inspection records show peer codes in Vehicle Maintenance carry far more bite: 396.3(a)(1) has a 45.3% OOS rate across 236,919 citations, and 393.9(a) hits 15.4% over 660,737 citations. By comparison, 393.95B's 0.0% OOS rate across 12,435 citations places it at the low-risk end. However, it ranks #195 out of 3,036 FMCSR codes by citation volume, meaning inspectors write it frequently — don't dismiss it as rare. The 4-point severity weight still accumulates in your Vehicle Maintenance BASIC.

Yes — equipment citations like this are contestable through DataQs if the facts are wrong. The FMCSA DataQs system (Request for Data Review, or RDR) lets drivers and carriers challenge inspection findings they believe were recorded in error. For 393.95B, strong grounds include: the equipment was actually present and compliant at the time of inspection, the inspector checked the wrong compartment, or there's a clerical error in the citation entry. Gather your pre-trip inspection log, any photos of your emergency kit, and the original inspection report (MCS-63 form) before submitting. DataQs won't remove a citation just because the equipment has since been replaced.

Texas is by far the top enforcement state. In the last 180 days, our inspection records show Texas issued 2,063 citations for 393.95B — more than three times any other state. The next highest were federal inspections coded to US jurisdiction with 653 citations, followed by California at 121 citations. Florida ranked fourth at 113 citations. If you run cross-border lanes into Texas or operate under federal inspection jurisdiction, this violation should be a standing item on your pre-trip checklist. Every cited state posted a 0.0% OOS rate, confirming the penalty is points and paper, not a shutdown.

Don't wait. The 90-day citation volume of 1,228 shows inspectors are actively writing this violation right now. Monthly data in our database puts recent months consistently above 700 citations per month (August 2025 peaked at 825). If you're missing triangles or fuses today, your next roadside inspection is likely to produce a second citation — and each new hit refreshes the CSA time-multiplier at its highest rate. Emergency triangles cost under $30 and spare fuses are cheaper still. There is no sensible reason to carry a recurring 4-point CSA exposure for a fix you can complete at the next truck stop.

Both, but in different FMCSA systems. The citation attaches to the vehicle's inspection record, which rolls into the carrier's Vehicle Maintenance BASIC score — that's where the 4 severity points land for the carrier. For the driver, the inspection report goes into their Pre-Employment Screening Program (PSP) record, which prospective employers can pull. The equipment responsibility (having triangles and fuses aboard) is the carrier's obligation to equip the truck, but drivers are expected to verify it on their pre-trip — which is why 392.8-D (failed to inspect/use emergency equipment) appeared alongside 393.95B in 208 shared inspections in the last 90 days.